. 2011 Oct 15;470(2):497–502. doi: 10.1007/s11999-011-2109-2

Table 2.

Patient demographics between pre- and postprotocol periods

Variable (units)	Pre	Post	p value
Age at surgery (years)	63 ± 12	63 ± 11	0.1171
Body mass index (kg/m²)	30 ± 6	30 ± 6	0.0256*
Length of hospital stay (days)	4 ± 3	4 ± 2	< 0.0001*
Gender (% male)	42.6	43.5	0.3129
Joint (% hips)	50.6	45.8	< 0.0001*

* p < 0.05.